File:Recorde - The Whetstone of Witte - equals.jpg
Recorde_-_The_Whetstone_of_Witte_-_equals.jpg (490 × 194 pixels, file size: 75 KB, MIME type: image/jpeg)
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Summary
DescriptionRecorde - The Whetstone of Witte - equals.jpg |
English: Robert Recorde's explanation of the first usage of the mathematical equals sign from which the current "=" symbol origins.
Čeština: Vysvětlení Roberta Recorde prvního použití matematického symbolu rovnosti, ze kterého vychází dnešní znak "=". |
Date | |
Source | http://blog.plover.com/math/recorde.html - The image is an excerpt from the Recorde's book The Whetstone of Witte. |
Author | Robert Recorde |
The text in the scanned image transcription
Howbeit, for easie alteratiõ of equations. I will propounde a fewe exãples, bicause the extraction of their rootes, maie the more aptly bee wroughte. And to auoide the tediouse repetition of these woordes : is equalle to : I will sette as I doe often in woorke vse, a paire of paralleles, or Gemowe lines of one lengthe, thus: =====, bicause noe .2. thynges, can be moare equalle. And now marke these nombers.
Licensing
Public domainPublic domainfalsefalse |
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https://creativecommons.org/publicdomain/mark/1.0/PDMCreative Commons Public Domain Mark 1.0falsefalse
Public domainPublic domainfalsefalse |
This work is in the public domain in the United States because it was published (or registered with the U.S. Copyright Office) before January 1, 1929.
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File history
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Date/Time | Thumbnail | Dimensions | User | Comment | |
---|---|---|---|---|---|
current | 23:27, 19 May 2014 | 490 × 194 (75 KB) | wikimediacommons>Sad Edgar | Centered. |
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Metadata
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Width | 485 px |
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Height | 184 px |
Pixel composition | Black and white (Black is 0) |
Orientation | Normal |
Number of components | 4 |
Horizontal resolution | 72 dpi |
Vertical resolution | 72 dpi |
Software used | Adobe Photoshop CS5 Windows |
File change date and time | 19:48, 19 May 2014 |
Exif version | 2.21 |
Colour space | Uncalibrated |
Unique ID of original document | DADB0DCBB0EEB692A52D2D8B9E02A083 |
Date and time of digitising | 21:45, 19 May 2014 |
Date metadata was last modified | 21:48, 19 May 2014 |
IIM version | 34,896 |